Abstract
The reactions of the osmium-tin cluster complexes Os3(CO)12(mu3-SnPh)Ph, 9, and Os4(CO)16(mu4-Sn), 10, with Pt(PBut3)2 have been investigated. Two products, PtOs3(CO)12(Ph)(PBut3)(mu3-SnPh), 11, and Pt2Os3(CO)12(mu2-Ph)(PBut3)2(mu3-SnPh), 12, were obtained from the reaction of 9 with Pt(PBut3)2. These are mono- and bis-Pt(PBut3) adducts of 9 formed by the addition of a Pt(PBut3) group to the Os-Os bond in 11 and the Os-Os bond and Os-C bond to the sigma-bonded phenyl group in 12. A PBut3 derivative of 11, Os2(CO)8(mu3-SnPh)Os(CO)3(PBut3)Ph, 13, was obtained by treating 12 with PBut3. The reaction of 10 with Pt(PBut3)2 provided the bis-Pt(PBut3) adduct Os4(CO)16[Pt(PBut3)]2(mu4-Sn), 14, that was formed by the addition of a Pt(PBut3) group across the Os-Os bond of both Os2(CO)8 groups in 10. All four new compounds 11-14 were characterized by single-crystal X-ray diffraction analysis.
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